CN113880448B - Spraying method of water-based ink and application thereof - Google Patents

Spraying method of water-based ink and application thereof Download PDF

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Publication number
CN113880448B
CN113880448B CN202111076276.4A CN202111076276A CN113880448B CN 113880448 B CN113880448 B CN 113880448B CN 202111076276 A CN202111076276 A CN 202111076276A CN 113880448 B CN113880448 B CN 113880448B
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Prior art keywords
spraying
spraying method
water
curing
ink
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CN113880448A (en
Inventor
刘建富
李平
孙润鹤
符饶生
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Hunan Sokan New Materials Co ltd
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Hunan Sokan New Materials Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/001—General methods for coating; Devices therefor
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C23/00—Other surface treatment of glass not in the form of fibres or filaments
    • C03C23/0005—Other surface treatment of glass not in the form of fibres or filaments by irradiation
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C23/00—Other surface treatment of glass not in the form of fibres or filaments
    • C03C23/0075—Cleaning of glass
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2218/00—Methods for coating glass
    • C03C2218/10—Deposition methods
    • C03C2218/11—Deposition methods from solutions or suspensions
    • C03C2218/112—Deposition methods from solutions or suspensions by spraying

Abstract

The invention discloses a spraying method of water-based ink and application thereof. A spraying method of water-based ink comprises the following steps: s1, setting a water-based photosensitive protective ink layer in a protective area on the surface of a base material B; 2. AF spraying is carried out on the unprotected area of the surface B of the base material and the surface A; s3, removing the water-based photosensitive protective ink layer, and arranging a water-based color ink layer in a protective area on the surface of the base material B. The spraying method of the water-based ink can solve the problem that the water-based ink has oil accumulation at edges and holes on a glass substrate, and can shorten the spraying process and reduce the cost.

Description

Spraying method of water-based ink and application thereof
Technical Field
The invention belongs to the technical field of ink spraying, and particularly relates to a spraying method of water-based ink and application thereof.
Background
VOCs are volatile organic compounds (volatile organic compounds), which in the general sense are volatile organic compounds; VOC in the environment protection sense refers to volatile organic compounds with active properties and harm. The oily ink adopts an organic solvent as a diluent, has high VOC content and is not friendly to the environment. The Water-based ink is mainly prepared by compound grinding of Water-soluble resin, organic pigment, solvent and related auxiliary agents, wherein the solvent is mainly deionized Water, so that VOC emission is basically 0.
The oily silk-screen printing ink covered on the rear cover of the glass of the 3C electronic product is replaced by the aqueous spraying ink, so that the discharge standard of low VOC is more met, and the environment-friendly requirement is also more met. However, since the surface tension of the aqueous color ink on the edge of the glass is higher than that of other positions, oil is very easy to accumulate at edges such as hole sites during spraying. In order to solve the above problems, the following spraying process is commonly adopted in the related art:
firstly, preparing a membrane: transferring on the PET film; (A Z-shaped transfer adhesive line is dripped on the membrane by a needle, the grain surface of the membrane is covered on the transfer adhesive, then the roller is adopted to roll the membrane to ensure the even distribution of the transfer adhesive, and then 15-1800 mj/cm is adopted 2 Is used for curing the transfer printing adhesive; plating optical plating on the transferred product, wherein the optical plating is usually performed by evaporating materials such as silicon dioxide, phosphorus pentoxide and the like so as to perform physical deposition to the nanometer thickness on the surface of the membrane; printing black cover on the product subjected to the optical plating, and printing a black matrix with a layer thickness of 7-8 mu m by adopting a mesh screen with 420 meshes; will be printedThe finished diaphragm CNC (numerical control milling machine) is in the size and shape of a mobile phone rear cover;
and then treating the glass cover plate: AF spraying (Anti Finger Print) is carried out on the front surface of the glass (baking is carried out at 150 ℃ for 30 minutes); spraying oily side masking ink (baking at 150 ℃ for 30 minutes);
the membrane is combined with the glass cover plate: coating optical adhesive on the front surface of the membrane, attaching the membrane to a glass cover plate, and putting the membrane into a vacuum bubble removing machine to remove bubbles; and finally packaging and discharging after cleaning.
The process can be used for spraying the oily paint on the side after the cover plate is pasted with the film, so that the scheme also has a relatively large amount of organic solvents and is not friendly to the environment. Furthermore, the process is complicated by the membrane.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the prior art described above. Therefore, the invention provides a spraying method of water-based ink, which can solve the problem that the water-based ink has oil accumulation at edges and holes on a substrate, shorten the spraying process and reduce the cost.
In a second aspect, the present invention provides a 3C electronic product comprising the product of the spray coating process described above.
According to one aspect of the present invention, there is provided a spraying method of water-based ink, comprising the steps of:
s1, setting a water-based photosensitive protective ink layer in a protective area on the surface of a base material B;
s2, performing AF spraying on the unprotected area of the surface of the base material B and the surface of the base material A;
s3, removing the water-based photosensitive protective ink layer, and arranging a water-based color ink layer in a protective area on the surface of the base material B.
According to a preferred embodiment of the invention, there is at least the following advantageous effect:
(1) In the spraying method provided by the invention, the water-based color ink is adopted to spray the substrate, and the coating effect (including appearance and adhesive force) which is equivalent to that of the oily ink can be obtained, so that the use of the oily ink can be reduced, and the VOC (volatile organic compound) emission can be reduced.
(2) Compared with the traditional spraying process needing the assistance of the membrane, the spraying method provided by the invention is simpler in process and higher in yield.
(3) The water-based photosensitive protective ink layer is arranged in the protective area of the surface B, so that the pollution of the protective area during subsequent AF spraying (anti-fingerprint spraying, namely, film technology of uniformly spraying AF liquid medicine on the surface of a product by spraying under high pressure is generally utilized), and the condition of unqualified adhesive force of the water-based color ink layer is further avoided; because the water-based photosensitive protective ink layer is arranged in the protective area, the hole sites and the edges of the non-protective area can be sprayed more fully during AF spraying, and the problem of oil accumulation of water-based color ink in the non-protective area is avoided.
In some embodiments of the invention, the substrate material comprises at least one of glass and plastic in the spray coating process.
In some embodiments of the present invention, in step S2, the unprotected area includes an edge area.
In some embodiments of the invention, the edge region refers to a region that is 1mm or less from the edge.
In some embodiments of the invention, the unprotected region further comprises a hole site region.
In some embodiments of the invention, the hole site region refers to a region within 1mm of the hole.
In some embodiments of the invention, in step S1, the setting comprises the steps of:
A1. spraying water-based photosensitive protective ink on the B surface of the base material;
A2. solidifying the water-based photosensitive protective ink positioned in the protective area;
A3. and (3) after the steps A1-A2 are circulated, developing and removing the water-based photosensitive protective ink positioned in the non-protective area.
In some embodiments of the present invention, in step A1, the aqueous photosensitive protective ink has a spray thickness of 10 to 12 μm.
In some embodiments of the present invention, the colors of the aqueous photosensitive protective ink in step A1 include, but are not limited to, blue and black.
In some embodiments of the invention, in step A2, the curing comprises sequentially performing thermal curing and photo curing.
In some preferred embodiments of the invention, the heat curing temperature is 80 to 100 ℃.
In some embodiments of the invention, the heat curing temperature is about 100 ℃.
In some embodiments of the invention, the time for thermal curing is from 10 to 15 minutes.
In some embodiments of the invention, the time for thermal curing is about 10 minutes.
In some embodiments of the invention, the UV (ultraviolet) energy in the photo-curing is 1000-1200 mj/cm 2 。
In some embodiments of the invention, the UV (ultraviolet) energy in the photo-curing is about 1200mj/cm 2 。
In some embodiments of the invention, the UV source is a halogen lamp in the photocuring.
During the photo-curing process, the light source cannot irradiate the non-protection area due to the angle problem, so that the aqueous photosensitive protective ink located in the non-protection area is not completely cured.
In some embodiments of the invention, in step A3, the number of the circulating steps A1 to A2 is not less than 2.
In some preferred embodiments of the invention, in step A3, the number of the cycling steps A1 to A2 is 2.
The reason for the cycling steps A1 to A2 is as follows: after the single-layer spraying is cured, pinhole problems can occur in the developing process; if the process is repeated once, the thickness of the coating in step A1 is increased, and the problem of edge deposition (edge deposition) is serious due to capillary phenomenon.
In some embodiments of the present invention, in step A3, the developing solution used for the developing is an aqueous solution of sodium carbonate.
In some embodiments of the invention, the aqueous sodium carbonate solution has a concentration of 0.9 to 1.1wt%.
In some embodiments of the invention, the aqueous sodium carbonate solution has a concentration of about 1wt%.
In some embodiments of the invention, the developing pressure is about 1.5kgf.
Since the aqueous photosensitive protective ink located in the non-protective region is not completely cured, it can be removed by the developer during development.
In some embodiments of the present invention, in step S2, the AF spray may be at least one of static spray and dynamic spray.
In some embodiments of the invention, the static spray coating has a thickness of 30-40nm.
In some embodiments of the invention, the static spray has a spray flow of 20-22g/m 2 。
In some embodiments of the invention, the dynamic spraying, the movement between the samples (substrates) to be sprayed, occurs.
In some embodiments of the invention, the movement speed of the sample to be coated is 8-10 mm/s.
In some embodiments of the invention, the movement speed of the sample to be coated is about 8mm/s.
In some embodiments of the invention, the flow rate of the spray head is 10-12 g/30s in the dynamic spraying.
In some embodiments of the invention, the flow rate of the spray head is about 10g/30s in the dynamic spray.
In some embodiments of the invention, in the dynamic spraying, the spray head swings perpendicular to the direction in which the sample to be sprayed is running.
In some embodiments of the invention, the amplitude of the oscillation is 450-500 mm.
In some preferred embodiments of the invention, the amplitude of the oscillation is about 500mm.
In some embodiments of the invention, the speed of the oscillation is between 450 and 550mm/s.
In some embodiments of the invention, the spray head is moved at a speed of about 500mm/s during the AF spraying process.
In some embodiments of the present invention, in step S2, baking is performed after the AF spraying.
In some embodiments of the invention, the baking temperature is 110 to 120 ℃.
In some embodiments of the invention, the baking temperature is about 120 ℃.
In some embodiments of the invention, the baking time is 30 to 40 minutes.
In some embodiments of the invention, the baking time is about 30 minutes.
In some embodiments of the invention, in step S3, the removing is performed by soaking with a solvent.
In some embodiments of the invention, the solvent comprises at least one of acetone, ethyl acetate, and butyl acetate.
In some preferred embodiments of the invention, the solvent comprises acetone.
In some embodiments of the invention, the soaking time is 30 to 40 minutes.
In some embodiments of the invention, the soaking time is about 30 minutes.
The solvent is capable of removing the aqueous photosensitive protective ink layer but is not detrimental to the AF that has been cured.
In some embodiments of the present invention, in step S3, the method for setting the aqueous color ink layer includes sequentially and circularly spraying the aqueous color ink and the curing step.
In some embodiments of the invention, the cycle is performed more than or equal to 2 times.
In some preferred embodiments of the invention, the cycle is performed 3 times.
The reason that the water-based color ink needs to be sprayed circularly is that the coating layer must reach a certain thickness to meet the color requirement, but the appearance problems such as edge accumulation and the like can occur when the water-based color ink is sprayed for one time.
In some embodiments of the invention, the spray-on aqueous color ink has a thickness of 12 to 15 μm.
In some embodiments of the invention, the curing temperature is 150 to 160 ℃.
In some embodiments of the invention, the temperature of the curing is about 150 ℃.
In some embodiments of the invention, the curing time is 10 to 20 minutes.
In some embodiments of the invention, the curing time is about 10 minutes.
In some embodiments of the present invention, the color of the aqueous color ink may be selected according to the actual situation, including, but not limited to, white, pink, and black.
Because the binding capacity between the AF coating formed in the step S3 and the water-based color ink is low, the water-based color ink cannot accumulate in the hole sites and the edge positions of the non-protection areas due to the protection effect of the AF coating.
In some embodiments of the invention, the spray coating method further comprises, after step S3, cleaning, inspecting and packaging the resulting component.
In some embodiments of the invention, the method of cleaning is by placing the resulting part on a plate cleaning station for cleaning.
In some embodiments of the invention, the pressure of the purge is 1.5kgf.
According to still another aspect of the present invention, there is provided a 3C electronic product including the product prepared by the spray coating method.
According to the invention, the 3C electronic product has at least the following beneficial effects:
the spraying method provided by the invention can effectively eliminate the oil accumulation of the product, so that the 3C electronic product prepared by the spraying method can more meet the requirements of consumers on the appearance of the product.
In some embodiments of the invention, the 3C electronic product comprises at least one of a cell phone, a computer (computer), and a tablet computer (IPAD).
Drawings
The invention is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is an external view showing a glass sample obtained in example 1 of the present invention;
FIG. 2 is an external view of a glass sample obtained in step T1 of comparative example 1 of the present invention.
Detailed Description
The conception and the technical effects produced by the present invention will be clearly and completely described in conjunction with the embodiments below to fully understand the objects, features and effects of the present invention. It is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present invention based on the embodiments of the present invention.
Example 1
The embodiment provides a spraying method of water-based ink, which comprises the following specific processes:
D1. setting a protective ink layer:
d1a spraying 11 μm thick black water-based photosensitive protective ink on the B surface of the glass; then the mixture is left at 100 ℃ for 10min to reach surface dryness, and then the UV energy is 1200mj/cm 2 Exposing under a halogen lamp;
d1b spraying black water-based photosensitive protective ink with a film thickness of 11 μm on the B side of the glass obtained in the step D1a, standing at 100deg.C for 10min to reach surface dryness, and UV energy of 1200mj/cm 2 Exposing under a halogen lamp;
d1c, placing the glass obtained in the step D1B in 1wt% sodium carbonate for developing to clean and remove black water-based photosensitive protective ink on the side, hole site and front of the B surface;
D2. spraying an AF layer: AF spraying is carried out on the A surface of the glass obtained in the step D1, wherein the flow rate of a spray head is 10g/30s, the spraying amplitude is 500mm, and the spraying speed is 500mm/s; the speed of the conveyor belt for placing the glass is 8mm/s; in the process, the side edges, the hole sites and the front surface are sprayed with AF liquid, and the spray coating is baked for 30min at 120 ℃ after the spray coating is finished;
D3. removing the black aqueous photosensitive protective ink: soaking the component obtained in the step D2 in acetone for 30min, wherein the water-based photosensitive ink layer obtained in the step D1 is removed by a solvent, and the AF solution obtained in the step D2 is reserved;
D4. spraying color ink:
d4a, spraying water-based ink with the thickness of 14 mu m on the B surface of the glass obtained in the step D3; because AF liquid with high water drop angle exists on the side, the hole site and the A surface, water-based ink cannot adhere;
d4b baking the glass obtained in step D4a at 150deg.C for 10min;
d4c, taking the medicine in the steps D4a to D4b for 3 times;
D5. cleaning: placing the product obtained in the step D4 on a flat plate cleaning machine, and applying a pressure of 1.5kgf for cleaning;
D6. and (5) checking and packaging after cleaning.
Comparative example 1
The comparative example prepared a spraying method of water-based ink, which comprises the following specific processes:
t1. spray color ink:
t1a spraying water-based ink with the thickness of 14 μm on the B surface of the glass;
t1b baking the glass obtained in step T1a at 150deg.C for 10min;
t1c repeating steps T1a to T1b 3 times;
and T2, spraying an AF layer:
AF spraying is carried out on the A surface of the glass obtained in the step T1, wherein the flow rate of a spray head is 10g/30s, the spraying amplitude is 500mm, and the spraying speed is 500mm/s; the speed of the conveyor belt for placing the glass is 8mm/s; in the process, the side edges, the hole sites and the front surface are sprayed with AF liquid, and the spray is baked for 30min at 150 ℃.
Comparative example 2
The comparative example prepared a spray method of oily ink, which comprises the following specific procedures:
t1. spray color ink:
t1a spraying oil ink with a thickness of 14 μm on the B surface of the glass;
t1b baking the glass obtained in step T1a at 150deg.C for 10min;
t1c repeating steps T1a to T1b 3 times;
and T2, spraying an AF layer:
AF spraying is carried out on the A surface of the glass obtained in the step T1, wherein the flow rate of a spray head is 10g/30s, the spraying amplitude is 500mm, and the spraying speed is 500mm/s; the speed of the conveyor belt for placing the glass is 8mm/s; in the process, the side edges, the hole sites and the front surface are sprayed with AF liquid, and the spray is baked for 30min at 150 ℃.
Test examples
This test example tests the performance of the coating on the glass samples prepared in the examples and comparative examples.
Appearance properties the appearance of the glass samples obtained in example 1 was visually examined as shown in fig. 1; comparative examples 1-2 the appearance of the samples obtained in step T1 is shown in fig. 2. As can be seen from fig. 1 to 2, the hole sites and edges of the glass sample obtained in example 1 are neat and smooth; obvious oil accumulation appears on the hole sites of the samples obtained in comparative examples 1-2, the oil accumulation is difficult to clean through cleaning, the oil accumulation is required to be scraped by a blade, the effect of blade scraping causes irregular hole sites of a finished product, the appearance is influenced, and the preparation cost is further increased.
The test example also calculated the VOC emissions for different spray methods: the VOC content in the paint refers to the content of volatile organic compounds in paint products, the VOC of oil ink is g/L of the mass of organic solvent in each liter of ink, water adopted by water-based ink is used as solvent, and the VOC is 0.
The thickness of the sprayed film is measured by a difference instrument, and the thickness of the accumulated oil is measured by a vernier caliper;
the adhesion test method was carried out with reference to a standard document of GB/T1720-1979 (89), and the specific results are shown in Table 1.
Table 1 properties of the process provided in example 1 and comparative example
The results in table 1 show that the spraying method of the water-based ink provided by the invention can effectively relieve the problem of oil accumulation at the edge of a glass sample, the adhesive force of the obtained coating is 4B, the coating is equivalent to the performance of a paint film obtained by oil-based ink, and the coating does not contain VOC and meets the use requirements.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention. Furthermore, embodiments of the invention and features of the embodiments may be combined with each other without conflict.

Claims (22)

1. The spraying method of the water-based ink is characterized by comprising the following steps of:
s1, setting a water-based photosensitive protective ink layer in a protective area on the surface of a base material B;
s2, performing AF spraying on the unprotected area of the surface of the base material B and the surface of the base material A; the non-protection area comprises an edge area and a hole site area;
s3, removing the water-based photosensitive protective ink layer, and arranging a water-based color ink layer in a protective area on the surface of the base material B;
in step S1, the setting includes the steps of:
A1. spraying water-based photosensitive protective ink on the B surface of the base material;
A2. solidifying the water-based photosensitive protective ink positioned in the protective area;
A3. and (3) after the steps A1-A2 are circulated, developing and removing the water-based photosensitive protective ink positioned in the non-protective area.
2. The spraying method according to claim 1, wherein in the step A3, the number of the circulating steps A1 to A2 is not less than 2.
3. The spraying method according to claim 1, wherein in the step A1, the spraying thickness of the aqueous photosensitive protective ink is 10-12 μm.
4. The spraying method according to claim 1, wherein in step A2, the curing includes sequentially performed heat curing and photo curing.
5. The spraying method according to claim 4, wherein the heat curing temperature is 80-100 ℃.
6. The spraying method according to claim 4, wherein the time for thermal curing is 10 to 15min.
7. The spraying method according to claim 4, wherein the UV energy in the photo-curing is 1000 to 1200mj/cm 2 。
8. The spray coating method of claim 4, wherein the UV source in the photo-curing is a halogen lamp.
9. The spraying method according to claim 1, wherein in the step A3, the developing solution used for the development is an aqueous sodium carbonate solution.
10. The spraying method according to claim 9, wherein the concentration of the sodium carbonate aqueous solution is 0.9-1.1 wt%.
11. The spraying method according to claim 1, wherein in the step A3, the developing pressure is 1.5kgf.
12. The spraying method according to claim 1, wherein in step S2, baking is required after the AF spraying.
13. The spraying method according to claim 12, wherein the baking temperature is 110-120 ℃.
14. The spraying method according to claim 12, wherein the baking time is 30-40 min.
15. The spraying method according to claim 1, wherein in step S3, the removal is performed by soaking in a solvent.
16. The spray method of claim 15, wherein the solvent comprises at least one of acetone, ethyl acetate, and butyl acetate.
17. The spraying method according to claim 1, wherein in step S3, the method for disposing the aqueous color ink layer includes sequentially and circularly spraying the aqueous color ink and curing.
18. The spraying method according to claim 17, wherein the number of times the cycle is performed is not less than 2.
19. The spraying method according to claim 17, wherein the thickness of the aqueous color ink is 12-15 μm.
20. The spray coating method according to claim 17, wherein the temperature of the curing step is 150-160 ℃.
21. The spraying method according to claim 17, wherein the curing step is performed for 10 to 20 minutes.
22. A 3C electronic product comprising the product of the spray coating method of any one of claims 1-21.
CN202111076276.4A 2021-09-14 2021-09-14 Spraying method of water-based ink and application thereof Active CN113880448B (en)

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JP2005017352A (en) * 2003-06-23 2005-01-20 Fuji Photo Film Co Ltd Platemaking method of flexographic printing plate
CN108234696A (en) * 2017-12-29 2018-06-29 信利光电股份有限公司 A kind of colorful cover sheet and preparation method thereof
CN108640533A (en) * 2018-05-14 2018-10-12 Oppo广东移动通信有限公司 Mobile terminal and its glass cover-plate
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CN106891635A (en) * 2017-01-18 2017-06-27 深圳市恒久瑞电子科技有限公司 A kind of transfer processing method of surrounding curved surface 3D cover plates
CN110564208A (en) * 2019-08-23 2019-12-13 湖南松井新材料股份有限公司 Low-temperature-resistant water-based high-temperature baking curing ink, and preparation method and application thereof

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